TiO2 Nanotube arrays: Influence of tube length on the photocatalytic degradation of Paraquat

Marien, Cédric B. D.; Cottineau, Thomas; Robert, Didier; Drogui, Patrick

doi:10.1016/j.apcatb.2016.04.040

Cited by 206 publications

(75 citation statements)

References 23 publications

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“…The latter characteristic implies that the electrolyte is capable of permeating the external and/or internal part of the nanotubes, at least to some extent, which is highly desirable for catalytic applications. Other authors have stated several observations regarding the geometrical aspects of TNTs, where the nanotube length plays an important role in the overall performance of their specific systems [27,60–61]. …”

Section: Resultsmentioning

confidence: 99%

“…Their study suggested that a combination of applied potential and annealing temperature were responsible for the high photocatalytic activity (PCA) of their materials in the oxidation of methyl orange. In a different approach, Marien et al observed a relation between the morphological features of TNTs and a higher yield in the degradation of Paraquat [27]. They proposed that the PCA of nanotubes is compromised by the length of these structures due to the diffusivity of the pollutant into the inner area of the TNTs.…”

Section: Introductionmentioning

confidence: 99%

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Impact of the anodization time on the photocatalytic activity of TiO₂ nanotubes

Díaz-Real¹,

Bandomo²,

Galindo‐de‐la‐Rosa³

et al. 2018

Beilstein J. Nanotechnol.

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Titanium oxide nanotubes (TNTs) were anodically grown in ethylene glycol electrolyte. The influence of the anodization time on their physicochemical and photoelectrochemical properties was evaluated. Concomitant with the anodization time, the NT length, fluorine content, and capacitance of the space charge region increased, affecting the opto-electronic properties (bandgap, bathochromic shift, band-edge position) and surface hydrophilicity of TiO2 NTs. These properties are at the origin of the photocatalytic activity (PCA), as proved with the photooxidation of methylene blue.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Impact of the anodization time on the photocatalytic activity of TiO₂ nanotubes

Díaz-Real¹,

Bandomo²,

Galindo‐de‐la‐Rosa³

et al. 2018

Beilstein J. Nanotechnol.

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“…The O 2− ions remain diffusing through the TiO 2 layer and reacts with the metal to produce fresh oxide at the bottom of the nanotubes. The rate of oxide growth at the metal-oxide interface and the rate of oxide dissolution at the oxide-electrolyte interface equalizes, thus the thickness of the oxide layer at the base of the nanotube essentially remains unchanged as it moves further into the metal making the pore deeper [11,12].…”

Section: Introductionmentioning

confidence: 99%

Controlling morphological parameters of a nanotubular TiO₂ coating layer prepared by anodic oxidation

Marchezini

Oliveira

Lopes

et al. 2020

Mater. Res. Express

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A promising modification route to improve osseointegration of dental and medical titanium devices is a nanostructured titanium oxide coating layer in the form of self-ordered vertically aligned nanotubes (or nanotubular TiO 2 ). In this work, we report a detailed investigation of nanotubular TiO 2 coating layer on metallic Ti substrate prepared by anodic oxidation. The main goal was to determine an optimized and reproducible route to produce a nanotubular TiO 2 layer with homogenous morphology, narrow distribution and accurate control of the nanotube diameter. The influence of electrolyte temperature, anodizing time and applied voltage were studied, comparing three different electrolytes: 1.5 wt% HF, 0.5 wt% HF, and 0.5 wt% HF+1 mol l −1 H 3 PO 4 . Samples were analyzed by SEM, EDS, FIB, and XPS techniques. The most favorable result was achieved by using 0.5 wt% HF+1 mol l −1 H 3 PO 4 electrolyte, for anodizing time of about 90 min, temperature of 20°C, and anodizing potential from 1 to 25 V. Using these parameters, a uniform self-organized nanotubular TiO 2 layer was prepared with a fine control of the nanotube diameter value over a wide range (10 to 100 nm).

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“…The various organic contaminants in water not only make it unable to be drunk but also may accelerate infectious diseases and threaten public health . Photocatalysis, which can harvest the inexhaustible solar energy for water purification, is recognized as a promisingly environment‐friendly and economical approach to tackle this issue . An increasing amount of semiconductor materials, have emerged with outstanding photocatalytic ability, aiming at the degradation of organic pollutants from water.…”

Section: Introductionmentioning

confidence: 99%

“…2 Photocatalysis, which can harvest the inexhaustible solar energy for water purification, is recognized as a promisingly environment-friendly and economical approach to tackle this issue. 3,4 An increasing amount of semiconductor materials, have emerged with outstanding photocatalytic ability, aiming at the degradation of organic pollutants from water. Anatase TiO 2 /MoS 2 exhibited high photocatalytic activity in degrading methylene blue (MB).…”

Section: Introductionmentioning

confidence: 99%

Rapid mass production of novel 3D Cu@CuI core‐shell mesh as highly flexible and efficient photocatalyst

Zhang

et al. 2018

J Am Ceram Soc

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We report a relatively simple and economical approach for mass production of Cu@CuI mesh. This novel core‐shell structure is CuI‐coated Cu mesh, fabricated by one‐step in situ iodination of commercial copper mesh at an ambient temperature. Such a Cu@CuI mesh is low‐cost and can be successfully used for the degradation of soluble organic pollutants in water under UV light. The novel 3D Cu@CuI core‐shell structure allows for high electron/hole separation and thus leads to high catalytic efficiency. Rhodamine B (RhB) is fully degraded in even just 6 minutes using a Cu@CuI mesh as the photocatalyst. Unlike the currently reported photocatalysts mostly in the form of powders, nanoparticles, and/or nanowires, the 3D Cu@CuI mesh is freestanding and flexible, and therefore is easily separated from water after photocatalysis without causing secondary pollution. This is a significant advance toward tackling the expansive separation issue of the conventional catalysts, because the ultra‐simple separation process of 3D Cu@CuI mesh can facilitate its industry application. With a fantastic combination of low cost, facile and green fabrication, high catalytic efficiency and easy separation 3D architecture, the Cu@CuI mesh may serve as a promising candidate for water purification.

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TiO2 Nanotube arrays: Influence of tube length on the photocatalytic degradation of Paraquat

Cited by 206 publications

References 23 publications

Impact of the anodization time on the photocatalytic activity of TiO₂ nanotubes

Impact of the anodization time on the photocatalytic activity of TiO₂ nanotubes

Controlling morphological parameters of a nanotubular TiO₂ coating layer prepared by anodic oxidation

Rapid mass production of novel 3D Cu@CuI core‐shell mesh as highly flexible and efficient photocatalyst

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TiO2 Nanotube arrays: Influence of tube length on the photocatalytic degradation of Paraquat

Cited by 206 publications

References 23 publications

Impact of the anodization time on the photocatalytic activity of TiO2 nanotubes

Impact of the anodization time on the photocatalytic activity of TiO2 nanotubes

Controlling morphological parameters of a nanotubular TiO2 coating layer prepared by anodic oxidation

Rapid mass production of novel 3D Cu@CuI core‐shell mesh as highly flexible and efficient photocatalyst

Contact Info

Product

Resources

About

Impact of the anodization time on the photocatalytic activity of TiO₂ nanotubes

Impact of the anodization time on the photocatalytic activity of TiO₂ nanotubes

Controlling morphological parameters of a nanotubular TiO₂ coating layer prepared by anodic oxidation